restructure lines and vectors
restructure lines and vectors

stardust66/math3d,ChristopherChudzicki/math3d,ChristopherChudzicki/math3d,stardust66/math3d,ChristopherChudzicki/math3d,stardust66/math3d,stardust66/math3d,ChristopherChudzicki/math3d